Default butane config to latest released, but make it overwrittable.

ci-operator/step-registry/ipi/conf/debug/kdump-configure-logs/ipi-conf-debug-kdump-configure-logs-commands.sh

@@ -7,17 +7,12 @@ set -o pipefail
 node_role=${APPLY_NODE_ROLE:=worker}
 log_path=${LOG_PATH:="/var/crash"}
 
-openshift_release="4.11.0"
-if [[ $(echo $RELEASE_IMAGE_LATEST | grep -o -e "4\.[0-9]\+\.") ]]; then
-  openshift_release="$(echo $RELEASE_IMAGE_LATEST | grep -o -e '4\.[0-9]\+\.').0"
-fi
-
 echo "Crash kernel set to ${CRASH_KERNEL_MEMORY}"
 
 echo "Configuring kernel dumps on $node_role nodes"
 cat >> "${SHARED_DIR}/manifest_99_${node_role}_kdump.bu" << EOF
 variant: openshift
-version: "$openshift_release"
+version: "${BUTANE_RELEASE}"
 metadata:
   name: 99-$node_role-kdump
   labels:

ci-operator/step-registry/ipi/conf/debug/kdump-configure-logs/ipi-conf-debug-kdump-configure-logs-ref.yaml

@@ -11,6 +11,11 @@ ref:
     default: "worker"
     documentation: |-
       The node role to configure kdump logs on.
+  - name: BUTANE_RELEASE
+    default: "4.15.0"
+    documentation: |-
+      You can read up on upgrading butane here (https://coreos.github.io/butane/upgrading-openshift/).
+      In general it's safe to stick to 4.15.0 unless this is upgraded to use a feature from a newer release.
   - name: KDUMP_COMMANDLINE_REMOVE
     default: "hugepages hugepagesz slub_debug quiet log_buf_len swiotlb"
     documentation: |-